1. Notes on the Old Red Sandstone of the Clee Hills;Ball;Proc. Geol. Ass., Lond.,1952
2. Breconian: a Stage Name of the Old Red Sandstone;Croft;Geol. Mag.,1953
3. The Northern Part of the Lower Old Red Sandstone Outcrop of the Welsh Borderland;Dineley;Trans. Woolhope Nat. Fld. Cl., Hereford,1951
4. The Geology of Anglesey;Greenly;Mem. geol. Surv. U.K.,1919